Flush valve



M y 26, 19.26.- W. J. CRIS'T ET AL 2 042,391

FLUSH VALVE Filed May 10 1954 Patented May 26, 1936 I UNITED STATES FLUSH VALVE Walter J. Grist and Charles W. Hess,

Middletown, N. Y.

Application May 10, 1934, Serial No. 724,967

1 Claim. (01. 13793) This invention relates to certain new and useful improvements in flush valves.

The primary object of this invention is to provide a flush valve particularly intended for use in connection with toilet bowls wherein it is desirous of releasing a body of water under full pressure into the bowl after operation of the trip valve.

A further object of this invention is to provide a flush valve comprising separable casing members which may be easily assembled and taken apart for the purpose of making repairs to portions of the valve and also for purposes of clean- A further object of this invention is to provide a valve structure including a casing member having a pair of parallel bores for receiving a valve and piston operator, both of which may be covered by a common base member, held in place by bolts or rivets.

A further object of this invention is to provide a flush valve of the above mentioned character including a manually operated trip valve for allowing water pressure to act on a piston thereby causing the release of the control valve and the resultant flushing of the bowl for a predetermined period of time.

A further object of this invention is to provide a flush valve having means for releasing pressure upon the valve operating piston after expiration of a time limit to effect closing of the main control valve.-

A further object of this invention is to provide a piston operated flush valve in which the valve and piston are mounted in separate chambers and are connected together by a rocker arm to cause the piston and valve to reciprocate alternately.

Other objects and advantages of the invention will become apparent during the course of the following description, taken with the drawing, wherein,

Figure 1 is a vertical cross-sectional view of the flush valve embodying this invention illustrating the parallel chambers formed in the main chamber portion and showing the arrangement of the communicating bores for conducting water under pressure to the piston chamber and further illustrating the manual valve for controlling the passage between the parallel chambers;

Figure 2 is a vertical cross-sectional view taken on line 2--2 of Figure 1, looking in the direction of the arrows illustrating the manually operated valve and its operating mechanism and further showing the rocker bar connecting the operating valve with the piston.

- In the drawing, wherein for the purpose of illustrating the invention and wherein like reference characters will be employed to designate like parts throughout the same, the reference character 5 will generally be employed to designate a flush valve casing comprising a cylinder block portion 6 with a communicating chamber portion 1.

Formed in the block section 6 are parallel cylinders or bores 8 and 9, the lower ends of which are open and communicate with the casing portion I into a chamber Ill. The sections 6 and I may be connected by means of a flange l I formed on the section 6 and being bolted to the section I by means of a machine screw [2.

The lower end of the valve chamber 8 may be screw threaded as at l3 for receiving a valve seat ring 14 having a valve seat [5 to be engaged by a valve disk l6 carried upon a slide rod I! having its upper end guided in a bore l8 formed in the upper portion of the chamber block 6. It will be noted that the disk It is mounted between flanges l9 and formed on the guide rod l1 and operating rod 2! respectively. A projection 22 extends through a bore formed in the valve l6 and is threaded into an opening formed in the lower end of the guide rod l1. Thelower end of the operating rod portion 2| is bifurcated for receiving a roller 23 held in place by a suitable pin or bearing 24.

The casing section 6 is provided with an inlet pipe 25 having communication with the chamber 8 whereby water pressure will seat the valve l6.

Communicating with the valve chamber 8 is a duct 26 which enters a trip valve chamber 21, formed in the upper portion of the casing section 6 and said chamber 21 is formed by boring an opening centrally with respect to the casing. The upper portion of the bore may be closed by a plug 28 having screw threads corresponding with screw threads formed in the bore. The bore 21 is formed adjacent a valve stem chamber 29 and is separated therefrom by means of a partition 30 having a series of openings 3| arranged in circular fashion, adapted to be normally covered by a mushroom valve 32, the stem of which as at 33 passes through an opening formed in the partition 30 and has its lower end extending into the chamber 29. An operating rod 34 projects into the chamber 29 and has its inner end presented to the valve stem 33 so that inward movement of the rod 34 will tilt or unseat the mushroom valve and'allow passage of water through the inlet 25 of the chamber 28, duct 26 and valve chamber 29. The operating rod extends through a boss screw threads. 7 Communicating with the chamber'29 is a bore 42' extending inwardly from the side wall of the" iormedi on a side wall of the block section 6 and sealed against escape of;water by means of a packing gland36 held in place by ,a plug 31 screw threadedly'mounted in the opening 38. The outer 'end f the operating rod 34 is adapted.

to be-engaged by a semi-spherical member 39 mounted on the endof a' rod 40'haIving ahandle' 4| and said rod '49 is loosely mounted in an opening formed in a semi-spherical cap ,42' having internal screw threads adapted to be threaded upon the boss-35 upon correspondingly arranged casing section 6 adapted to be closed by a screw threaded plug 43. The innermost end of the bore 7 42' is restricted'as at 44 and is provided with a .ball valve 45 whereby passage of water'from the chamber 29. to the bore 42 will only be allowed;

The bore 42 communicates with the piston cham ber9 throughan opening46 having a restricted portion 41 whereby water under pressure ,may enter the chamber 9 after tripping of the mushroom'valve 32. I V a 7 Reciprocably mounted within the piston cylinder or chamber 91s a piston .48 having a flexible packing element 49 secured in assembled position by means of a nut 50 upon the piston rod 5|. The lower end of thepiston rod 5l is bifurcated for receiving one end of a rocker arm 52 as at 53 which rod is fulcrumed upon a'stud 54 havingone of its ends screw threaded as at 55 'to be received in the block section 6, while the V opposite end of; the stud 54 is bifurcated for the passage of the rocker arm 52 which is held in place with respect to the stud 54 by means of a pin 56.

The opposite end of the rocker arm 52 may be engaged by the roller 23 carried by the lower end of the valve rod 2 I. It will thus be seen that downward movement of the piston 48 will efiect the raising or, unseating of the valve I 6 after operation of the mushroom valve 32"thereby causing water to flow from'the chamber 8 through the chamber l0 and out of the opening or outlet 5'! formed in the chamber section 1, while outlet 51 may lead to the toilet bowl for flushing purposes. '1 r W 7 Upon closing of the mushroom valve 32after release of the handle 4| water pressure will be, cut oil" from the piston chamber 9 with its resultant action upon the piston 48. This operation will cause the seating of the valve l6 along with the raising of the piston 48 in a slow and even fashion by reason of the vent duct 58 which communicates with the upper portion of the piston chamber 9 through an angular by-pass 59 while the opposite end of the duct 58 communicates with the chamber [0 on the underside of the piston 48.

For the purpose of preventing the valve I6 from being closed too suddenly, a screw threaded needle 'valve 60 is mounted in the casing and has its pointed end 6| presented to the angular bypath 59 so that water escaping from the chamber 9 will be retarded by reason of the restricted passage connecting the'by-pass 59 and the duct 58; When it is desired to clean portions of the valve structure within the casing section 6, the'* bolts if! maybe removed and the casing 6 lifted off of the section 1 after the water connection with the inlet 25 has been disconnected, thereby allowing free access to the interior of the valve f structure and its valve part thereby making it easier for the part of the valve to be'cleaned, re paired and replaced. 7

. It is to be understood invention herewith shown and described'is to be taken as a preferred embodiment of the invention and that various changes in the shape, size and arrangement of parts may be resorted to without departing from thelspirit and scope of the invention as claimed, j

We claim:--

A flush valve comprising a casing having sep- 7 arable upper and lower sections and flush valve mechanism carried by the upper section to perthat the form'of the mit access thereto when the two sections are SCI)? aratedQsaid flush valve mechanism including a pair of' parallel chambers formed in the'upper section, a valve located in one of the chambers, a pistonmounted in the other chamber, a-rocker arm connecting the valve and piston and extending across the lower end s of the two chambers, a manually operable valveinterposed between the upper ends of the 'two chambers, and including'a stem, a hand operated plunger lat; erally engaged'with the stem'for unseating the valve, a duct at each side of the valve respective 15/ leading to the chambers, a check valvein the duct leading to the piston chamber, a vent extending from the upper end of the piston chamber to the lower section of the casing and means for varying the area of the vent.

' WALTER J. CRIST. CHARLES W. HESS. 

